利用正弦波调幅(SAM)音调后的电位估计人的听力阈值

Proceedings of the 1991 IEEE Seventeenth Annual Northeast Bioengineering Conference Pub Date : 1991-04-04 DOI:10.1109/NEBC.1991.154612

T.J. Gennosa, R. Batra, S. Kuwada

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引用次数: 0

摘要

双耳正弦波调幅(SAM)音调被用来唤起沿调制包络的头皮电位。本文研究了这种调制频率接近40 Hz的调幅跟随响应(AMFR)是否可以通过两种方法来估计特定频率的听力阈值:(1)降低声强，直到无法再唤起AMFR;(2)将振幅强度函数线性外推到零伏响应。两种方法得出的估计值都在行为阈值的15db以内。还开发了一种可以识别约20 dB的双边灵敏度差异的方法。这包括将AMFRs与双耳SAM音调在其信封相同或不相同的情况下进行比较。阈值估计表明，AMFR可能是评估频率范围内听力阈值的有效工具

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Estimating human hearing thresholds using potentials that follow sinusoidally amplitude modulated (SAM) tones

Binaural sinusoidally amplitude modulated (SAM) tones were used to evoke potentials from the scalp that followed the modulation envelope. It is examined whether this amplitude-modulation following response (AMFR), with modulation frequencies near 40 Hz, can be used to estimate frequency-specific hearing thresholds by two methods: (1) decreasing sound intensity until the AMFR could no longer be evoked and (2) linearly extrapolating the amplitude-intensity function to a zero volt response. Both methods yielded estimates that were within 15 dB of the behavioral threshold. A method that could identify bilateral sensitivity differences of about 20 dB was also developed. This involved comparing AMFRs to binaural SAM tones when their envelopes were in- or out-of-phase. Threshold estimates suggest that the AMFR may be an effective tool for assessing hearing thresholds across the audiometric range of frequencies.<>

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Proceedings of the 1991 IEEE Seventeenth Annual Northeast Bioengineering Conference

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